1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sasho [114]
2 years ago
6

About when did the first limbs evolve in tetrapods (land-dwelling vertebrates)?

Biology
1 answer:
kirza4 [7]2 years ago
5 0

Answer:

365 million years ago

Explanation:

The tetrapods are a super-family which includes all living and extinct vertebrates that have walked and are still walking the Earth, including the mammals, reptilians, dinosaurs, sinapsids, pterodactyls, amphibians, birds. They have evolved from fish-like creatures that were living in the shallows, and over the course of millions of years they were slowly changing and adapting to amphibian life, thus partially aquatic, partially terrestrial. The first proper limbs, at least what is know so far from the fossil records, have emerged with the ichthyostega and acoantostega around 365 million years ago. These two species were able to lift their body above the ground with their limbs, support its weight, and walk on them without dragging their body on the ground. The first transitional limbs can be seen in a species that has been dated to around 375 million years ago, the Tiktaalik, which had had limbs, but still not well developed, and it was only able to stand on them while in shallow water, but on on land.

You might be interested in
Being interested in native butterflies, you include the native caterpillar host plants of several butterflies in your annual lan
svetoff [14.1K]

Answer:

d. introduce native flowering plants the adult butterflies need for nectar, their main food.

Explanation:

Organisms choose the habitat based on the availability of basic requirements such as food, nutrients, space, etc. in the region. The absence of one or more of these factors makes them choose another habitat. Butterflies feed on nectar made by plants in their flowers. To make the butterflies stay in the landscape, flowering plants adapted to local conditions should be planted. The butterflies would feed on the nectar of these plants and would stay in the landscape.

3 0
3 years ago
Approximately how much principal would need to be placed into an account earning 3.575% interest compounded quarterly so
cestrela7 [59]
Answer: b
Explication: b
6 0
2 years ago
Read 2 more answers
What are 3 ways animals help the rainforest plants survive
-Dominant- [34]

Answer:

They cary seeds and pollen

there poop  fertilizeres the plants

They kill other animals that eat plants

Explanation:

6 0
3 years ago
Read 2 more answers
A tumor composed of epithelium is an epitheli _______.
Evgen [1.6K]
Sarcoma- 'Sarcoma' means malignant tumour.
3 0
3 years ago
Read 2 more answers
PLEASE HELP
xxMikexx [17]

Answer: DNA provides a set of chemical instructions to specific genes that the gene uses to make proteins in order to determine traits.

Explanation: Genes provide instructions that are used to determine the sequence of amino acids needed to make up a protein.

7 0
2 years ago
Other questions:
  • G protein‑coupled receptors (GPCRs) and receptor tyrosine kinases (RTKs) are two basic receptor types by which cells transduce s
    15·1 answer
  • Wolves are predators for hares. the wolf population increases. what happens next?
    11·2 answers
  • One species of a small birdlike animal has an extremely variable tail length, which is a highly polymorphic trait. Geneticists h
    9·1 answer
  • Which of these conditions would promote aldosterone release from the adrenal glands
    5·1 answer
  • Which endocrine gland maintains the body's homeostatic set point at 37 c?
    12·1 answer
  • Anyone got that bud h m u
    5·1 answer
  • Which change is an environmental effect of burning fossil fuels?
    6·1 answer
  • Which of the following statements are true? Select all that apply.
    11·1 answer
  • An investigation was carried out to determine which of three antibacterial soaps is most effective. Four petri dishes labeled A,
    14·1 answer
  • What is the different between men and women
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!